#!/usr/bin/python
# -*- coding: utf-8 -*-

# This file is part of Cockpit.
#
# Copyright (C) 2016 Red Hat, Inc.
#
# Cockpit is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Cockpit is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Cockpit; If not, see <http://www.gnu.org/licenses/>.

import parent
from testlib import *

@skipImage("kexec-tools not installed", "continuous-atomic", "fedora-24", "fedora-atomic", "centos-7", "debian-8", "debian-testing", "ubuntu-1604")
class TestKdump(MachineCase):
    def rreplace(self, s, old, new, count):
        li = s.rsplit(old, count)
        return new.join(li)

    def enableKdump(self):
        # we need to make sure that the kernel command line options include our crashkernel parameter
        if "atomic" in self.machine.image:
            # on atomic we have a crashkernel option already, but for auto
            contents = self.machine.execute(command="cat /boot/grub2/grub.cfg", quiet=True)
            self.machine.write("/boot/grub2/grub.cfg", contents.replace("crashkernel=auto", "crashkernel=256M"))
        else:
            lines = self.machine.execute(command="cat /etc/default/grub", quiet=True).split("\n")
            lines = map(lambda line: self.rreplace(line, '"', ' crashkernel=256M"', 1) if line.startswith("GRUB_CMDLINE_LINUX") else line, lines)
            self.machine.write("/etc/default/grub", "\n".join(lines))
            self.machine.execute("grub2-mkconfig -o /boot/grub2/grub.cfg")
        self.machine.execute("mkdir -p /var/crash")

    def rebootMachine(self):
        # Now reboot things
        self.machine.reset_reboot_flag()
        self.machine.spawn("sync && sync && sync && sleep 0.1 && reboot", "reboot")
        self.machine.wait_reboot()
        self.machine.start_cockpit()
        self.browser.switch_to_top()
        self.browser.relogin("/kdump")

    def testBasic(self):
        self.browser.wait_timeout(120)

        self.allow_restart_journal_messages()

        if not "atomic" in self.machine.image:
            self.machine.execute("systemctl enable kdump && systemctl start kdump || true")

        self.login_and_go("/kdump")

        self.browser.wait_visible("#app")

        # right now we have no memory reserved
        self.browser.wait_in_text("#app", "No memory reserved.")
        # service should indicate an error and the button should be off
        self.browser.wait_in_text("#app", "Service has an error")
        onOffSelectorActive = "div.btn-onoff-ct label.active"
        self.browser.wait_in_text(onOffSelectorActive, "Off")

        # there shouldn't be any crash reports in the target directory
        self.assertEqual(self.machine.execute("""find "/var/crash" -maxdepth 1 -mindepth 1 -type d -exec echo {} \;"""), "")

        self.enableKdump()
        self.rebootMachine()
        self.browser.wait_visible("#app")

        # we should have the amount of memory reserved that we indicated
        self.browser.wait_in_text("#app", "256 MiB")
        # service should start up properly and the button should be on
        self.browser.wait_in_text("#app", "Service is running")
        self.browser.wait_in_text(onOffSelectorActive, "On")

        customPath = "/var/crash2"
        # try to change the path to a directory that doesn't exist
        settingsLink = "a:contains('locally in /var/crash')"
        self.browser.wait_present(settingsLink)
        self.browser.wait_visible(settingsLink)
        self.browser.click(settingsLink, True)
        pathInput = "#kdump-settings-local-directory"
        self.browser.wait_present(pathInput)
        self.browser.wait_visible(pathInput)
        self.browser.set_val(pathInput, customPath)
        # make sure the backend is updated before we try hitting apply
        self.browser.wait_attr(pathInput, "data-stored", customPath)
        self.browser.click("button.btn-primary:contains('Apply')")
        # we should get an error
        self.browser.wait_present("div.dialog-error:contains('Unable to apply settings')")
        # also allow the journal message about failed touch
        self.allow_journal_messages(".*mktemp: failed to create file via template.*")
        # create the directory and try again
        self.machine.execute("mkdir -p {0}".format(customPath))
        self.browser.click("button.btn-primary:contains('Apply')")
        self.browser.wait_not_present(pathInput)
        self.browser.wait_present("a:contains('locally in {0}')".format(customPath))

        # service has to restart after changing the config, wait for it to be running
        # otherwise the button to test will be disabled
        self.browser.wait_in_text("#app", "Service is running")
        self.browser.wait_in_text(onOffSelectorActive, "On")

        # crash the kernel and make sure it wrote a report into the right directory
        self.browser.click("button.btn-default")
        # we should get a warning dialog, confirm
        crashButton = "button.btn-danger:contains('Crash system')"
        self.browser.wait_present(crashButton)
        self.browser.wait_visible(crashButton)
        self.browser.click(crashButton)

        # wait until we've actuall triggered a crash
        self.browser.wait_present("div.spinner")
        self.browser.wait_visible("div.spinner")

        # wait for disconnect and then try connecting again
        self.browser.switch_to_top()
        self.browser.wait_present("div.curtains-ct")
        self.browser.wait_visible("div.curtains-ct")
        self.browser.wait_in_text("div.curtains-ct h1", "Disconnected")
        self.machine.disconnect()
        self.machine.wait_boot(wait_for_running_timeout=300)
        #self.browser.click("#machine-reconnect")
        #self.browser.expect_load()
        #self.browser.wait_visible("#login")
        self.assertNotEqual(self.machine.execute("""find "{0}" -maxdepth 1 -mindepth 1 -type d -exec echo {{}} \;""".format(customPath)), "")

if __name__ == '__main__':
    test_main()
